Special:
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[DAT] (requires LDraw-compatible viewer)
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Subject:
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Re: HELP !!! Rotating a cylinder
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Newsgroups:
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lugnet.cad
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Date:
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Fri, 8 Sep 2000 16:21:25 GMT
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Viewed:
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677 times
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In lugnet.cad, Travis Cobbs writes:
>
> As for lining the two up, I would suggest to first line them up
> axis-aligned, and then multiply both matrices by a rotation matrix that
> rotates about the shoulder. Or, if the sphere is positioned just the way
> you want it, then rotate about the center of the sphere. Do you know how to
> do this?
no
> If not, get it lined up along some axis, and then post what you
> have, along with how exactly you want it rotated, and I'll post the rotated
> version, along with notes on how I produced it.
>
> --Travis Cobbs (tcobbs@san.REMOVE.rr.com)
2 24 14.8 -16.4 6.1 16.8 -5 6.1
4 16 14.8 -16.4 6.1 16.8 -5 6.1 16.8 -5 -6.1 14.8 -16.4 -6.1
1 14 21.2 -11.2 0 3.15 0 0 0 3.15 0 0 0 3.15 4-8SPHE.DAT
1 14 21.2 -11.2 0 3.15 0 0 0 -3.15 0 0 0 -3.15 4-8SPHE.DAT
0
Travis, I need a cylider, radius 2.8, with a center line perpendicular to the
shoulder plane going from the plane to the center of the sphere. I hope this
is enough information.
I will not be online until next Monday. I hope you can help me.
Thanks, Dennis
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Message has 2 Replies:
 | | Re: HELP !!! Rotating a cylinder [DAT]
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| OK, here is what I came up with: 2 24 14.8 -16.4 6.1 16.8 -5 6.1 4 16 14.8 -16.4 6.1 16.8 -5 6.1 16.8 -5 -6.1 14.8 -16.4 -6.1 1 14 21.2 -11.2 0 0.547 -3.102 0 3.102 0.547 0 0 0 3.15 8-8SPHE.DAT 1 14 21.2 -11.2 0 0.379 -5.909 0 2.147 1.044 0 0 0 2.18 (...) (24 years ago, 8-Sep-00, to lugnet.cad.dev)
| | | Re: HELP !!! Rotating a cylinder
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| I have responded to this in the lugnet.cad.dev newsgroup, which is a more appropriate location for the response. --Travis Cobbs (tcobbs@san.REMOVE.rr.com) (24 years ago, 8-Sep-00, to lugnet.cad)
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Message is in Reply To:
| | Re: HELP !!! Rotating a cylinder
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| A few things. First, I thought I'd point out that the code actually has two spheres, SLIGHTLY offset from each other (If you zoom in far enough, you can see the a slight crease). You'll have to remove one of them in order in order to truly line up (...) (24 years ago, 7-Sep-00, to lugnet.cad)
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